In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND 9 Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2647-1 bind9 security update
Debian DSA Debian DSA DSA-4909-1 bind9 security update
EUVD EUVD EUVD-2021-12125 In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND 9 Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.
Ubuntu USN Ubuntu USN USN-4929-1 Bind vulnerabilities
Ubuntu USN Ubuntu USN USN-7739-1 Bind vulnerabilities
Fixes

Solution

Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.31 BIND 9.16.15 BIND 9.17.12 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.31-S1 BIND 9.16.15-S1


Workaround

Disabling incremental zone transfers (IXFR) by setting request-ixfr no; in the desired configuration block (options, zone, or server) prevents the failing assertion from being evaluated.

History

No history.

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: isc

Published:

Updated: 2024-09-17T00:37:21.136Z

Reserved: 2021-01-15T00:00:00

Link: CVE-2021-25214

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-04-29T01:15:07.977

Modified: 2024-11-21T05:54:33.470

Link: CVE-2021-25214

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-04-28T00:00:00Z

Links: CVE-2021-25214 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses